FR2679880A1 - PUSH BUTTON FOR PRESSURIZED CONTAINER FOR SPRAYING A LIQUID, AND PRESSURIZED CONTAINER PROVIDED WITH SUCH A PUSH BUTTON. - Google Patents

Abstract

The push-button (4) comprises a collar (5) intended to be fixed on a pressurized container (1), a spray nozzle (7) and a system (8) of internal pipes suitable for connecting the outlet of a rod. (3) from valve to nozzle (7). The system (8) of internal ducts comprises closure means (F) suitable for closing a passage (15) leading to the nozzle (7) when the angle formed between the axis (A) of the container and the vertical exceeds a predetermined gamma value, which corresponds to a bad position, while these shutter means (F) are able to open when said angle becomes less than the predetermined value gamma, which corresponds to a good position of use .

Description

PUSH BUTTON FOR PRESSURIZED CONTAINER FOR

  SPRAYING A LIQUID, AND PRESSURIZED CONTAINER

EQUIPPED WITH SUCH A PUSH BUTTON.

  The invention relates to a button

  pusher for a pressurized container intended for spraying a liquid, equipped with a hollow valve stem on which the push button can be pressed in order to push the stem and cause the

  spraying, this push button comprising a collar

  ler intended to be fixed on the container, a spray nozzle and a system of internal pipes suitable for connecting the outlet of the rod

nozzle valve.

  It is known that such pressurized containers, also called aerosols, are intended to be used either "upside down" or "upside down", depending on the type of pressurized container, and depending on whether or not it has a dip tube with inside If the user positions the pressurized container improperly, the spraying will not be carried out under good conditions or will not take place at all, and the opening of the valve will cause a waste of the propellant

  contained in the pressurized container.

  This problem is particularly acute when the container is pressurized not by a vapor / liquid balance at ordinary temperature, for example using a freon or other liquid, but by a compressed gas, such as air. of this

compressed gas is disastrous.

  FR-A-2 631 320 proposed a solution

  sistant to mechanically block the push button when the container occupies a wrong position, so as to prevent use However, if in use, that is to say when the user has already started to press the push button, the wrong position is given to the pressurized container, the proposed locking device

  does not intervene and does not prevent the loss of pro-

  kicker. The object of the invention is, above all, to provide a push button which makes it possible to reduce, or even eliminate, the waste of the propellant element of the pressurized container, by preventing any use of this pressurized distributor in a bad position, even if use started while

the position was satisfactory.

  The invention also aims to provide

  such a push button which is of a simple realization

  full and economical and reliable.

  According to the invention, a push button for a pressurized container intended for spraying a liquid, equipped with a hollow valve stem on which the push button can be pressed in order to push the stem in and cause the spraying , this push button comprising a flange intended to be fixed on the container, a spray nozzle, and a system of internal conduits suitable for connecting the outlet of the valve stem to the nozzle, is characterized in that the system of internal piping is equipped with closure means capable of closing a passage leading to the nozzle when the angle alpha formed between the axis of the container and the vertical exceeds a predetermined gamma value, which corresponds to a bad position, while these shutter means are suitable for opening when said angle alpha becomes less than the predetermined gamma value, which

  corresponds to a good position of use.

  With such a push button, spraying and loss of propellant are prevented, even if after starting spraying with the container in a correct position, the user, during spraying

  gives a bad position to said container.

  The sealing means include, before

  taggingly, a cylindrical passage formed in the pusher and serving as a housing for a movable obturation member capable of moving under the action of gravity, the cylindrical passage forming a beta angle, equal to the complement (1 V / 2 gamma) of the

  predetermined gamma value, with the axis of the button-

  pushbutton intended to be vertical and coincident with the axis of the container when the push button is mounted on the container and the container occupies the

normal position of use.

  The push button can be arranged for head-up use or head-down use.

  The movable member is advantageously con-

  set up by a ball The internal piping system of the push button comprises an axial piping intended to be located in the extension of the valve stem, this piping opening into

  the cylindrical passage This cylindrical passage

  runs along one side to the side wall of the push-button and is closed by a plug, while at its other end it communicates through a hole of reduced diameter with a pipe reaching the

spray nozzle.

  The push-button preferably includes means for bringing the part of the cylindrical passage which is located upstream of the closure means to atmospheric pressure, when the latter occupies the closed position of the nozzle, this setting atmospheric pressure taking place when

  the user stops pressing the push button.

  These atmospheric pressure setting means comprise elastic means capable of spreading, at rest, the push-button from the end of the valve stem so as to establish a connection with the atmosphere when one ceases

to press the button.

  Advantageously, the elastic means comprise a hinge-film ensuring the connection between a fixing flange on the container and a zone of the push-button situated, preferably, in line with the spray nozzle, the part of this push-button diametrically opposite with the film hinge being free vis-à-vis the fixing flange, the assembly being such that in the rest position of the push button, the film hinge maintains a frustoconical end of the axial pipe

  away from the end of the valve stem.

  The predetermined gamma value, limit for

  the angle alpha is advantageously of the order of 300.

  The invention also relates to a pressurized container equipped with a push button such

as defined above.

  The invention consists, apart from the arrangements set out above, of a certain number of other arrangements which will be more explicitly discussed below in connection with an exemplary embodiment described with reference to the attached drawing, but who

is in no way limiting.

  FIG. 1, of this drawing, shows, in vertical section, a push button according to the invention,

  in the rest position, mounted on a container

  surise partially shown outside.

  Figure 2 shows, similarly to Figure 1, the push button pressed, while the container is in a good position, which

allows spraying.

  Figure 3, finally, similarly shows in Figure 2, the push button pressed but while the container occupies a bad position, the

spraying being prevented.

  Referring to FIG. 1, one can see a pressurized container 1 intended for spraying a liquid and capable of operating head up. This container is provided, in the upper part, with an opening closed by a cup 2 set on the edge of the opening and equipped with a valve provided with a hollow rod 3 which, when pressed, ensures the opening of the valve and allows the passage of the liquid from the container 1 to the outside The container 1 is surmounted by a push button 4 comprising, at its

  base, a flange 5 for fixing the button-

  pusher 4, preferably by snap-fastening, on the

edge of cup 2.

  The push button 4 comprises a cylindrical upper part 6 of smaller diameter than the collar 5 and in which is provided a spray nozzle 7 and a system 8 of internal pipes suitable for connecting the outlet of the rod of

valve 3 at nozzle 7.

  The push-button 4 comprises elastic means E suitable for separating, at rest, the frustoconical lower end 9 from the piping system

  internal 8, of the upper end of the rod 3.

  As visible in FIG. 1, a space J, allowing the passage of air, exists at rest between the upper edge of the rod 3 and the surface of

the end 9.

  The elastic means E are advantageously constituted by a film hinge 10 provided over an angular extent reduced to the right of the nozzle 7 and

  ensuring a connection between the collar 5 and the

  cylindrical tie 6 Most of the lower periphery of the part 6 is free with respect to the collar 5, in particular in a region diametrically opposite to the hinge 10; a radial clearance 11 thus exists between the lower edge of the part 6 and the

edge adjacent to the collar 5.

  It is therefore possible, by pressing the upper rear part of the push button 4

  to press this push button and, with it, the rod 3.

  The upper part of the push button 4 is provided with a concave zone 12 in which transverse grooves 13 are provided to allow good support

  of the user's finger on the push button.

  The internal pipe system 8 comprises an axial pipe 14, the axis of which is substantially vertical and aligned with that of the rod 3 when the push button 4 is in the rest position, as shown in FIG. 1, the container

1 being vertical.

  The piping system 8 is further equipped with shutter means F suitable for closing a passage 15 leading to the nozzle 7 when the angle alpha (see FIG. 3) formed between the axis A of the container and the vertical exceeds a value predetermined gamma The shutter means F are capable of opening when this angle alpha becomes less than

the predetermined gamma value.

  The passage 15 is a cylindrical passage whose axis is located in the plane passing through the axis of the outlet orifice of the nozzle 7 and by the axis of the pipe 14 The passage 15 is inclined at a beta angle by relative to the axis of the pipe 14 (coincident with the axis A of the container 1) This beta angle is complementary to the predetermined gamma value, that is to say that beta = 1 fl / 2 gamma In the example considered , the aforementioned predetermined gamma value is approximately 30, while the beta angle is approximately 600. The cylindrical passage 15 opens at its

  lower part, on the lateral surface of the

  tie 6 It is closed at this end by a plug 16 The opposite upper end 17 of this passage 15 has a frustoconical shape and communicates by a radial channel 18, of reduced section, with the outlet orifice of the nozzle 7 The pipe 14 opens into the

passage 15.

  The shutter means F comprise a movable shutter member constituted by a ball 19 capable of moving in the passage 15 under the action of gravity. The ball 19 can be applied from

  tightly against the frusto-conical end 17 ser-

  front of seat to this ball as illustrated in FIG. 3 The internal diameter of the passage 15 and the diameter of the ball 19 are greater than the diameter

internal of the pipe 14.

  Line 14 is provided in a man-

  chon 20 of outside diameter significantly smaller than the inside diameter of the cylindrical part 6 so

  that an annular space exists between these two surfaces.

  Stiffening wings 21, angularly spaced at regular intervals, are provided to establish a radial connection between the outer surface of the sleeve

  and the interior surface of part 6.

  However, the operation is as follows. In the rest position, as shown in FIG. 1, the container 1 is vertical The frustoconical end 9 of the sleeve 20 is slightly spaced from the rod 3 The ball 19, by gravity, rests against

  the plug 16 in the lower part of the passage 15.

  The container 1 being intended to be maneuvered head up, if a user presses the push button 4, as illustrated in FIG. 2,

  keeping container 1 in the correct vertical position

  wedge, the button 4 rocks around the hinge 10 in the clockwise direction, and the frustoconical end 9 presses, in a sealed manner, on the rod 3 by pushing it in. The ball 19 remains in the bottom of the passage

  , against the plug 16 The sprayed liquid will come out

  shot by the rod 3, the pipe 14, the upper part

  passage 15 and nozzle 7 as illustrated in fig-

ure 2.

If, for any reason,

  the user tilts the axis A of the container 1 relative-

  lying vertically, as illustrated in FIG. 3, by an angle alpha greater than the gamma value, the ball 19 moves, under the action of gravity, to come to bear against the frustoconical seat 17 and seal the passage to nozzle 7 Spraying cannot

no longer take place.

  It should be noted that this stopping of the spraying is of the dynamic type because it occurs,

  even if spraying has started under the conditions

  Figure 2, as soon as for some reason

  conch, the user tilts the container 1 beyond the authorized limit while continuing to press

on button 4.

  Of course, if the inclination is given to

  container 1 before even pressing the button-

  pusher 4, spraying will be prevented at the time

  o the user will press button 4.

  When the user returns the container 1 to its vertical position having stopped pressing the button 4, the film hinge 10 returns the button 4 to the position of FIG. 1 and re-establishes the play which puts the atmosphere the pipe 14 and the part of the passage 15 located upstream of the ball 19

  which is in abutment against the frustoconical seat 17.

  The pressurized gas contained in the passage 15 and the pipe 14 can escape, and the ball 19 can return to the low position shown on the

figure 1.

  The description was given about a

  container intended to operate "head up".

  It is clear that the push button of the invention could be provided for a container intended to operate "head down", the inclination of the

  passage 15 being chosen accordingly to produce the same results as those mentioned above, that is to say closure of the outlet nozzle when the inclination of the axis of the container, relatively to the vertical, exceeds a value predetermined.

Claims (6)

  1 push button for pressurized container intended for spraying a liquid, equipped with a hollow valve stem on which the push button can be pressed in order to push in the stem and cause the spraying, this push button comprising a flange intended to be fixed to the container,   a spray nozzle and a piping system   internal connections suitable for connecting the outlet of the valve stem to the nozzle, characterized in that the system (8) of internal pipes is equipped with closure means (F) suitable for closing a passage (15) leading to the nozzle (7) when the angle alpha formed between the axis (A) of the container and the vertical exceeds a predetermined gamma value, which corresponds to a bad position, while these sealing means (F) are specific to s '' open when said alpha angle becomes less than the predetermined gamma value, which corresponds to a good position of use.   2 push button according to claim 1, characterized in that the shutter means (F) comprise a cylindrical passage (15) formed in the pusher (4) and serving as a housing for a movable shutter member (19) likely to move under the action of gravity, the cylindrical passage (15) forming a beta angle equal to the complement (Y 1/2 gamma) of the predetermined gamma value, with the axis of the push button intended to be vertical and coincides with the axis (A) of the container when the push button is mounted on the   container and the container occupies the nor- male use.   3 push button according to claim 1 or 2, characterized in that the movable member (19) consists of a ball.   il 4 Push button according to any one   of the preceding claims, characterized by   fact that the system (8) of internal pipes of the push button comprises an axial pipe (14) intended to be located in the extension of the valve stem (3), this pipe (14) opening into the cylindrical passage (15).   Push button according to claim 2, characterized in that the cylindrical passage (15) extends, on one side, to the side wall of the push button and is closed by a plug (16), while at its other end, it communicates through a hole of reduced diameter with a pipe (18)   arriving at the spray nozzle (7).   6 Push button according to any one   of the preceding claims, characterized by   fact that it includes means (E, J) for setting   atmospheric pressure of the part of the cylinder passage   drique (15) which is located upstream of the closure means (F, 19) when the latter occupies the closed position of the nozzle (7), this setting to atmospheric pressure takes place when the user stops pressing on the push button (4). 7 push button according to claim 6, characterized in that the setting means   atmospheric pressure include elastic means-   ticks (E) suitable for spreading, at rest, the button-   pusher (4) from the end of the valve stem (3), so as to establish a connection (j) with the atmosphere   when you stop pressing the button.   8 push button according to claim 7, characterized in that the elastic means (E) comprise a film hinge (10) ensuring the connection between the flange (5) for fixing on the container and an area of the push button located in line with the spray nozzle (7), the part of this push button diametrically opposite the   film hinge (10) being free from the collar   fixing lug, the assembly being as in posi-   tion of the push button, the film hinge maintains a frustoconical end (9) of the canali-   axial position (14) spaced from the end of the valve stem (3).   9 Push button according to one of the claims   previous cations, characterized in that the predetermined value gamma, limit for the angle alpha,   is of the order of 300. 10 Pressurized container equipped with a push button according to one of claims previous.